Carl succumbs and joins the cat-blogging masses in a post about his pet Tino: "The evolution of cats has been a tough nut to crack. While it's no great mental feat to tell the difference between Tino and a tiger, it's not so easy to figure out exactly which species are most closely related to domesticated cats and which are more distant relatives. The oldest cat-like fossils date back 35 million years ago, and since then they've rapidly evolved into many lineages that have spread across all the continents save Antarctica."